Mining machine



'M. P. HOLMES MINING MACHINE Filed mien 29." 1927 July 21, 1931;

. 6 Sheets-Sheet l July 21 1931. p, M S 1,815,873

MINING MACHINE Filed'M'ar ch 29. 1927 e Sheets-Sheet '2 J3 549- d1 23111 Z6 2725 x14 60 II z g 6 6 M 5 Q15 3 I11 5 m L15 4 7 M43:

45 L 1.21:5" I 9 v 6 E A%W7 Z 36 as 2 1% 52 a9 27 J& 26 .1. u

' 1931. MQP. HOLMES I 1,315,373

' MINING MACHINE Filed March 29. 1927 6 shets -sheet 3 July 21., 1931.-M. P. HOLMES 1,815,873

MINING MACHINE Filed March 29.1927 6 Sheets-Sheet 4 13 9 L19 Z06 Z.

4 r I I. 2M L is M. P. HOLMES 7,815,873

MINING MACHINE Filed March 29. 1927 6 Sheets-Sheet 6 J ly' 21,- 1931.

. Pa tentecl July 21:,

{STATES m OFFICE Moms rinonmns or cLA EMoN'r, NEW HAMPSHIRE, ASSIGNOB TOSULLIVAN C IN COMPANY, AYCORPVORATION or MASSACHUSETTS Murine MAGHINEApplication filed March 29., 1927. "Serial No. 179,357.

This invention relates to mining machines and more part1cularly, but notexclusively, to.

coal miningimachine's of thecontinuou'scutter flexibly fed type adaptedto cut a horizontal kerf in the coal face. Anobjectxof this inventionisto provide an improved-coal mining machinelof the continuous cutterfiexibly fedflqow vein type having lmproved feeding means especiallyadapted to use with either the longwall or room an'd pillar systemsofmining. Another obj'ectiof this inventionis to provide an im-' PIOVgdroom and pillar mining machine of extremelyloiv and compact characterespe-* s ciallyadapted to use mineshaving relative Qly narrow veinsofcoal'; Stlll another object [of this invention-isto providean'improved mining machine having 'an improved cutting mechamsm andan'improvcd feedlng mecha- '20 nism, saidmechanisms being'driven'fromtheopposite ends of the driving motor. I A furtherobject of this; inventionis to provide an improved mining 7 machine of the .lo'ngwall'type'having apower driven feedoperating' member :anda power. drivencontrolling or take-up member. Yet another object of this" inventionisto provide an-improvedcfoal mining machine of theinvertible'typeadapted to operate selectively eitheras'an undercutter or as anovercutter; provide coal mining machine ofthe com binedl'ongwall'androom and pillar low vein type having an improvedarrangement of controlling and feeding parts whereby the movement of themachineduringcuttingin accordancewith either system of mining is greatlyfacilitated. Another object is to provide an improved andsimplifiedplural speed 'transmlsslon" mechanism between the motor 40 anotherobject of this invention isto provide an improved controlling means forthe cutter v chain drive which: has associated therewith .-imp'rovedlockingmeans for the pivoted. cut.

ter bar. improved Qmining fmachine having, an improvedcompact generalarrangement'of parts;

Thesei and other objects and [advantages of this invention'will,however,hereinafter more 5 an appear.

type having aplurality of coaxially arranged power driven rope Windingdrums one of axes vertical and arranged ina novellocation of coaxialWindingdrums having. their axes vertical and disposed at the end ofthema- A further object is to I and the feed and 'controllingdrumsJ Still Afurther object is to provide an In a preferred form of the invention theobjects stated areachieved by providing a coal mining machine of thecombined longwall and room and pillar continuous cutter low vein whichis for feeding the machine relative to the coal face Whilethe other isoperative for controllingthe position of the machine rel ative to'thecoal face, these drums having their m and driven from thedriving motorin an improved manner. More specifically, a preferred embodiment of theinvention may comprisean'invertible machine frame slidable on either oftwo opposed plane surfaceson the mine floor and preferably formed of afeed section, a central motor section and a cutter section,the latterhaving a projecting cutter bar which is pivotally mounted thereon forhorizontal'swinging movement and adapted to be locked in a plurality ofoperative positions relative, to the frame. The feeding mechanismpreferably comprises a plurality" chine frame remote'from the cuttingmecha-' nism and these drums are driven at either a fast or a slow speedand at any desired variants of such speeds under the control ofaplurality of friction clutches. Flexible feed cables may be attached toand wound upon the feed drums; In "the accompanying drawings in which anillustrative embodiment of the invention is shown, a 7

Fig. 1 is a plan view'of the improved mining machine, the cutter barandfeed cables beingshown in a plurality of operative positions. g

Fig.2 is a side elevational view of the machine shown in Fig. 1. I

Fig. 3 is a longitudinally extending central i vertical sectional viewtaken on line 3-3 of F' g."1' and illustrating the improved cuttingmechanism and cutter bar loc Fig.4 is alongitudi ally extending verticali sectional view taken on line 4.-4 of Fig. 1 and 1 illustrating theimproved feedingmechanism. I r Fig..5is a detail sectional viewillustrating 1'00 7 parallel plane surfaces. 3; and.

the cutter chain clutch and the improved har locking means associatedtherewith, the con trolling parts being shown in a plurality ofoperative positions.

F ig. 6 is a detail view of the cutter chain controlling clutchand barloclr shown in F ig. 5.. i 1

Fig. 7 is a transversehorizontal detail sectional viewtalgensubstantially on line 7( of Fi 4'. V

F 1g. '8 is a transverse horizontal sectional View illustrating the feedFig. 9 is a transverse vertical sectional View taken substantially online 9 9 of Figs. 1 and 8a; v

10. is. an. end; elevatio-nal' View of the end; oi theslmpron'ed;machine. g. 111 is a detail view Illustrating apertiorr-offthecontrolling clutch for the teed:

ing dnums.

V igi 12 ,is ai tramsverse'vertical. sectional View: substantially on;line 1 212 of Fig. 13' is a detail sectional View taken on linel3' l 3ofFigi 8;. lilig 114iis a tragmentary plan View part-ia-lly broken: awayin section to facilitate illustration and: illiistrating details of thefeedingmechanismi 1 151s. a diagrammatic VIGW illustrating the improved;machine when. cuttingin accordance. with the room andzpillar system of:mining, the. machine being shown cutting, from. mght-toi'leiit;

Figa1i6 is a. diagrammaticview illustrating the machine when: cutting inaccordance with mining.

the l ongw-aill. system. of

, Fig. is. diagrammatic view illustrating themachi'ne mounted on. atruck and operate ing: as an. entry cutter.

- hi1 tlnisiiliistrative embodiment ot-the inveniiioni thereisshownmining machine this 1 ignatedi as anentirety byfthe referencecharacter-Jiand' whiclnis'herein: ot the flexibly fed. continuous cutertype adaptedto cut either according tothe: longWa-ll or the room Themachine present and pillar systems of mining. 1 comprises an invertible.frame 2:

supported: during cutting, thereby enable the-machine to; operate eitheras an undercut.-

terzfor-an overcutter].Pivotally mounted at i one end of the machineframe 2 on a vertical a-xis: as. at: 5 is. an elongated plane.horizontal cutter bar 6 about the. margin. of whicha cutterrbit carryingcritter chain. 7- is. adapted ten tabs-circulated; The cutter bar 6. isadapted to he lock'ed in diiferentpositiionswith respect tothe'inachineifzrameflhe cutter bar being adapted to; held either. in aposition exor: it ang l este the at either s dethereof. .eedingrot' themachine may be employed, gearing, partsbelng' shown in plan.

ably formed integral with by the cutter 4 upon.- which the machine isadapted to be selectiye'l-y v A I top cover: plate :n longitudinally oi?thema'chine. frameaccomplished by either of two flexible feedingelements, here in cables or ropes 8 and 9, each wound upon a feedoperating member, herein in the form of coaxially arranged winding drumshaving their axes vertical and disposed at the end of-the machine frameopposite from the cutter bar. 6, the drums being. respectivelydesignated and 11.

During longwall cutting the upper feed drum ll'and' the feed cable 9 maypreferably be while duringrooni and pillar cutting. the. feed drum l1and the feedcable 9 may he used to efl'ect feet, while the other feeddrum 10 and feed cable 8 will be used to centrol the angular position ofthe machine relative toth'e. coal. face. 7

Referring more particularly to the ma-v chine, it will be noted thatthesame herein comprises three sections, i; a motor section 12 whichherein comprisesamotor cashig and bottom platesnpporting the motorcasingin elevated. positiomaieed section. 13 and a cut; ter carryingsection 14;, the feedand cutter sections being herein. disposed atopposite ends 01"- the motor section and rigidly connected to the;latter in such. manner as to term a; rigid; and very low compact frameslidab-le on the; mine floor. It. will heparticulnrly neted: thathereinthe upper and lower surfaces 4. and; 3; of they frame sectionsareoreferably disposed in common-planes in sucn manner as to unite: to.form a singleshoe'adaptedto permit free movement of the machinethereonoverthemlne floor.

'll'nyspecifically describing, the improved cutting. mechanism" itwill'herei'nbe noted. that housed within. the motor section; 12 is an electic motor, herein preferably of the reversible, type: having itsarmature. shaft 15 horizontally disposed and extending long.-itudinallyot the machine. Fixed by a key and screw connection 16 to oneend of: the armature shaft15 (isee'Fig. V pinion-18 which meshes with ahorizontally disposed-larger bevel gear. 19 herein prefer a verticallydisposed hollow shaft' 20, the latter being journaled in ball bearings21' frame As shown, fixed to: and'rotatable' with the bevel gear which.meshes witha larger spur gear 23' havinga cylindrical. hub portion 24'journaled' on ball bearings. 25 herein preferably surrounding andsupported by a. Vere tical. stud 26; As shown 1n 26" isthread'edlyconnected'at its opposite end as at 237 to detachabl cap members' 28 and29; respectivelythese caps: being secured to, the machine name by bolts30; The cap 28i's hereinfcarri'ed' by a: detachable ried by detachablebottom will herein. be; noted thatv the caps 28, 29

and plates 31, 32 may bedetachedi the,

is V. a bevel" 19: is a spur pinion 22;

Fig. 3 the stud:

31, While, the cap 29 is. car

plate 32- lit suitably carried-v section 14. of the machine machineframe topermiti'axia'l withdrawal of 'the vertical stud 26 and gear23from theframe thereby facilitating assembly and dismantling: of themachine. As illustrated,

the cylindrical sleeveportion "of the gear 7 23 is-connected by asemi-perman-ent clutch 33 to a spur gear-'34 having ahubportionsurrounding and rotatably'mounted on the vertical stud 26.Rotatablyfmounted on i 5 the, hub of'the spur gear 34and alinedtherewith is'a spur gear 35 connected, as by a 1 semi-permanent clutch36 to the cyhndrical hub'of a cutter chain; drive'sprocket 37. As

7 shown in Fig. 3 the 'cuttenjchain drive sprocket'3'7 is rotatablymounted on ball bearings '38 surrounding and supported by the verticalstud26; Thehub portion of the gear 34 is interposed' between the lowerbearing for the' gea'ri 23 and the upper bearing-38 forthe sprocket 37.The'bearings 38 and the sprocket 37 are" maintained in operative,position by means of a cup shaped member orstep bearing 39 held inposition by'the bottom plate and to which -;'the bolts are threadedlyconnected. The Vertical stud 26 is suitably pinned to the cap member 28and the; step bearing 39 to prevent rotation of the stud. Cooperatingwith thefmember 39 isa depending annular portion'39 herein formed'intiegralwith the cut ter frame section 14. ,Disposed on opposite sidesor the 'cutter chain sprocket 37 and carried respectively by thecup-shaped member 39 and the annular portion 39 are oil 'retainingrings40, these rings preventing leakage of oil from the interior of the ma-'ch'ine and also preventing the'entry of dirt or'other foreignsubstances to'the internal mechanism. Formed in the frame sectlon 14 is,a vertical bore'41'within which is vertically reciprocable a"cylindrical clutch shipper member 42 connected at 43 to an internalgear clutch memberx44 having teeth" which are adaptedlto cooperate withthe "1 teeth; otthe spur gears 34 and as will later be pointed out.Thecutter bar 6 is mounted for swin'ging'movement on bearing sleeves 45and 46, the latter being supported on the member 39, while the formersurroundsfla cylindricalfportion on the ma chine frame." Secured bybolts'47 to the? cutter bar 6 is a bearing andlocking' ring 48' hereinpreferably composed of two parts to facilitate assembly; The lockingring 48 is provided with'ia recess 49 to which one of the feed cables isconnectible toeffect swinging of the cutter bar. Also formed in thelocking ring 48 is a plurality 'herein three, of locking recesses orgrooves 50. The

39? looking ring 48 is herein rotatably mounted on-a two-part'bearin'g'sleeve 51 supported ona cylindrical flange 52 herein formed'integralfwith the machine frame, the bearing sleevex45 valsoengagingthe'fiange 52. The 5' improved operating mechanism for the cut 18 whichdrives the cutter chain (see Figs;

ter chain clutch 44 and the-improved bar locking means associatedtherewith specifically comprises (see also Figs. 5 and 6) upstandinglugs 53 herein formed integral with the shipper ring 42. The lugs 53carry inwardly projecting pins 54 which cooperate wvith the slottedends55 of a shipper means 56 having its side arms pivotally mounted at I .57on horizontal shafts 58' carried by dc 68 to a rotatable locking member69 also supported by the shaft 65. The lockingm'em-- ber 69 is adaptedto cooperate with the reg cesses or notchesfiOiormed in the locking ring48 secured to the'cutter bar 6; The .1

sleeves67 are rotatably mounted in bearings 70 herein formed integralwith the frame section 14. Clutched at 71 to the outer ends of thesleeves 64 are handles 72 disposed at opposite sides of the'machine. Thehandles 72 are adapted to be held in different adjusted positions bymeans of adjustable locking pins 7 3 carried by the handles 72 andcooperating with suitable apertures 74 formed in the sides of themachine frame. It will accordingly be evident that the operator maygrasp one of the handles-72 and rotate the same so that the lockingmember 69 may be moved relative to one of the notches 50 and also theclutch member 44 moved axially. It will be understood that one pin 73isinactive when the other is in use. Assumethe handle 72 is in the posia'tion showninfull lines in Fig. 5. Upon initial counterclockwisemovement of the handle '72 ;(viz. to the position of Fig. 3) the clutchmember 44 is moved to. connect the gears or clutch members 34 and 35,con sequently connecting the cutter chain sprocket in drivingrelationwith the motor. Upon further movement of the handle 7 2 (to the dottedposition of Fig. 5) the locking member 69leaves the locking recess 50.Upon still further movement of the handle 72 the clutch 44 is movedagain to its disengaged posltion while the locking member 69 remains inreleasingrelation. It is therefore obvious that the single handle 72 maybe operated to control both the'cutter bar lock andithe driving of thecutter chain. i r

As shown in the drawings, theimproved I I feeding mechanlsm specificallycomprises a spur pinion 75 fixed to the end. of the armature shaft 15opposite from the bevel pinion 4,81, 9; and 12). The motor pinion 7 5meshes with a spuridler gear 76 keyed as at 77.,

to a horizontal shaft 78 extending longitudinally of the machine anddisposed parallel with the motor shaft 15. As' shown in keyed as at 81to a horizontal shaft, 82disposed in the samehorizontal plane withtheshafts and 78. As illustrated, the shaft 82 is journaled at its.opposite ends in ball bearings 83 suitably carried by the feed 1 framesection. 'Theshaft 82 has preferably formed integral therewith a bevelpinion 84 which meshes with a bevel gear 85 keyed at 86 to a horizontalshaft 87 arranged transversely of the machine "in advance of theshafts15, 7 8 and 82. The shaft 87 has secured thereto at its inner end by akey 88 a spur gear 89, the hub of the latter being internally bored at90 to receive a ball bearing 91. The bearing 91 is supported by aprojecting stud or dowel 92 suitably secured by screws 93 within thefeed frame section. It will also be observed that the bevel gear 85 isinternally bored at 94 to receive a ball bearing 95, the latter being.likewise supported by a projecting stud or dowel 96 secured by screws97.to the side ofthe frame section 13'. 7

Referring more particularly to F ig. 9 it ,will be noted that the spurgear 89 meshes 5 with a spur gear 98 keyed at 99 to a shaft I 100disposed above and parallel with the I ratio to obtain differentpredetermined feedshaft 87 The gears 89 and 98 are changed speed gearsand it is obvious that these gears may readily be removed from theirrespective shafts and replaced by gears of different tooth ing speeds.As shown, the inner end of the shaft 100 is journaled through a ballbear ing 101 carried within a bore 102 formed within the hub ofthe gear98. The opposite end of the shaft 100 is journaled'in a ball bearing 103suitably carried within a detachable bearing bracket 104. The bearing101 and bracket 104 are supported on dowel pins 105, 106, respectively,similar to the dowel .pins 92 and 96 heretofore described. It

will herein be observed-that by providing the detachable dowel pins'92,96, 105 and 106 it is possible to remove the shafts 87'and 100 from 5'their supports with facility, these dowel pins also providing anexceedingly stable bearing and supporting structure for the shafts.Moreover, it will be noted that upon removal of the top plate and dowelpins the shafts may be lifted bodily from the machine with facility. Theshafts 87 and 100- have respectively rigidly secured theretointermediate their ends worms 107 and 108, the former having oppositelyinclined teeth of steeper lead than the teeth of the latter. The worms 710 and 11 in 107 and 108 rotate in opposite directions. As.

clearly shown in Fig. 12 the worms 107 and 108 mesh respectively withworm gears 109 and 110, the latter being coaxially arranged and disposedon a vertical axis. The worm gears 109 and 110 each have hubportionsrespectively journaled on ball bearings 111 and 112 suitably carried bythe machine frame. As shown, the hub portions of the gears 109, 110 eachcarry spaced alined ball bearings 113 within which theopposite ends of avertically disposed shaft 114 are journaled. The shaft 114 has hereinpreferably formed integral therewith intermediate its ends an elongatedspur pinion115 which meshes with a spur gear 116 connectible, in amanner to be later described, to a Vertically disposed shaft 117disposed in the longitudinal center of the machine and journaled at itsupper end in ballbearings 118 positioned by a detachable cover plate119. The shaft 117 has secured thereto by a key 120 a spur pinion 121having a hub portion journaled of the ball bearing 118 and beingthreadedto the pinion at its lower end. The spur pinion 121 is adapted todrivethe feed drums V a novel -manner to be later described.

Improved mechanism is provided for alternatively frictionally connectingthe fast and slow speed worm gears 109, 110 to the shaft 114 and thismechanism specifically comprises a pivoted shipper yoke 123 (see Figs. 8and 12) carrying at its inner end suitable rollers 124 which are adaptedto engage the plane surfaces of axially movable cylindrical clutchapplying members or pressure plates 125 and 126. The members 125 and 126have projecting fingers extending through apertures in spider members127 and 128 positioned within the gears 109 and 110, respectively,'bymeans of radially expansible split rings 129. The,

rings 129 are seated within annular grooves 130 formed within the wormgears; As clearly shown in Fig. 12 the members 127 and 128v are eachprovided with internal gear teeth 131 which are interlocked with theteeth at the ends of the pinion 115. Furthermore, each of the members127, 128 carries a series of clutch discs 132 which are interleaved witha corresponding series of clutch discs 133 carried by the hub of theworm gears 109 and 110. In accordance with the illustrative form oftheinventionrthe outer 'end of the shipper yoke 123 is provided with abifurcated portion 134 straddling an enlarged portion, 135 of avertically disposed rod :136

threadedly connected at its lower end within 'themachine frame, theenlarged portion 135 having-flattened sides which engage the innersidesof the bifurcated portion 134. The bi turcated portion134 providedwith arcuate orjj rounded ends which engage upper and lower transverseyokes .137 and 138, respectively, engaging the'upper and lower surfacesofthc-enlarged portion135 of the ma. The

theretofbolts 139 which engage coiled springs 140 carried withinrecesses141 formed in the upper yoke'137-.. It willthus be evident thatthebiturcated member 134 and the resiliently connected yoke 137,138 forma 'yieldabl'e piv otal mounting for the shipper yoke 123, the coiledsprings 140 being adapted to yield; upon overloadot either of thecontrolling clutches 13 2, 133. Improved meanslis providedffor swingingthe shipperyoke 123 about'its pivot comprising a" crank :pinforeccentric 142 (see 8)= formed integral with a rotatable rod 143 journaled at its opposite ends within bearings suitably carried by theframe section 13.

Secured-to the" outer end of the rod 143 by a key'144'is an operatinghandle 145 conveniently located at the end of the machine; Ro-

tation of the rod 143 is limited by a pin and slot connection 146. Itwill accordingly be evident I that rotation of the handle 145 andconsequently the eccentric 142 effects swing ing'movement of the shipperyoke 123and consequently one or the other of thecontrollingclutches 132,133 connecting the worm gears'109, 110 to the shaft 114 is applied,causingrotationof the latter at either a fast speed or at a slow speed,in the same direction. l The crankpinor eccentric 142 locks the shipperY I yoke 123 in either its raised or lowered posi tionrwhenthe centerfofthe eccentric passes thevertical center of the rod 136; a i

g Improved clutch i mechanism, is provided for connectingthe spur gear116gto the shaft 117andthis clutch mechanism as shownin'the drawingsspecifically comprises external clutch teeth 147 formed on a flangedportion 148 of the shaft 117 As shown in'Figs. 4 and 12, internal clutchteeth-149 are formed ona clutch ring 150 movably mounted in a recessformed'within the gear 116 and these clutchteeth engage clutch teeth 151formed on the gear 116. The clutch teeth 149 are adapted to cooperatewith the clutch teeth 1'47 ashereinafter described. It will herein beobservedthat the clutch ring 150 is re- 'tained within the recess: inthe gear 116 by meansof a radially expansible split ring 152 disposedwithin fan 1 internal V groove 153 I .formed within the gear116. Theretaining ring-152 presents a projecting shoulder with which a radialflange 154 on the clutch ring 150isadapted normally yieldably maintainedagainst the I retaining rlng 152' by means of coiled springs [155. -Asshown in Figs. 4, 8, 11and'12se cured within the frame section 13 byscrews 156 which also holdithe cap member 119 in positio'nfis anannnlarmember 157 centrally lower yoke 138 has threadedly connected.

ends at 173 to the machine frame. 172 is provided with a graspingportion 17 4 'in an improved manner. particularly to Fig. 4 it will beobserved that I to engage. The clutch ring is i cut away at 158 toreceive thehub of the spur gear 116 and the shaft 117. -Furthermore, thesideof the member 157 is cut away as at 159 to clear the upper .wormgear 110. The member 157is provided with a depending flanged portion 160having formed therein inclined cam slots 161 (see Fig. 11)-With whichradiallyjlocated pins'162 carried by'a grotatable shipper ring 163cooperate, the

shipper ringcarrying a series of rollers 164 which engage the upperplanesurface of'the clutch ring150 a's clearly shown in Fig. 12. Theshipper ring163 is provided with laterally projecting lugs or teeth 1 65wi th V 7 which a tooth or lug 166 formed on a horizontal rod167-cooperates; The rod 167 isaX- a ia'l'ly movable transversely of themachine and guided at its opposite ends in bores168 formed in themachine 'frame.

meansof a pin and slot connection 169. *As illustrated, the rod 167 hasthreadedly connected thereto an adjustable eye'member 170 which ispivotally connected (see also Fig. Q 10) as at 171 to a lever 17 2, thelatter in turn being 'pivotally connected intermediate its The leverdisposed adj acent the handle, 145; Thus it will be evident that whenthe operator grasps the portlon 174 and swings the lever'17 2 about itspivot, the rod 167 is moved axiallyandthe clutch'ring 163 isconsequently rotated? 5R0; tation of the clutch ring 163 causes the pinsand interlocking the clutch teeth 149 with teeth 147 as wellas, 151,therebyconnecting the gear 116 to the shaft 117 As pointed out .abovethe5pinioni121 is adapted to drive the feed drums 10 and 11 Referringmore the pinion 121 meshes with an internal gear 176 formed integralwith the upper feed drum 11. The hub 177 of the feed drum 11 isrotatably mounted on spaced alined ball bearings 178 supported by acentral upstanding sleeve portion-179 formed integral with the lowerfeeddrum "10. The hub portion 179 is rotatably mounted by ball bearings 180suitably carried by the frame section 13, the lower bearing' 180 beingcarried by, a detachable bottom plate 181, ,The' bottom plate 181 isrigidly secured to'the n me section 13 by suitable means including averticalstud 182, the latterpassing coaxially 7 I 1 through the hub 179.As shown in" Fig. 4',

interposed between the hub 177 of the'd rum 11 and the hub 179 of thedrum 10 is an oil ring 183, while interposed between retaining I thelower drum lO iand the bottom plate 181 is 51111112111 oil retainingring 184. Tn this 'iastaheeguie but at the simian-has Rotative movementof the rod'167 is p t d b -"r 162 carried thereby to move downwardly Fwithin the inclined cam slots 161 consequent jly'moving the clutchring150.downwardly projecting lfin'gers- 18-7 ticularly; to Fig; "7 it willbe observed that the fingers 187 have. inclined surfaces 188 whichcooperate with corresponding inclined Ellifaces 189 formed on clutch orbrake shoes 190..1' Each of thebrake shoes 190 carries a strip ofbrakingmaterial 191v interposed between the; outersurfaces of the brake shoesand thesmooth inner periphery 192 of the lower feed drum 10. Thebrakeshoes 190 eachihavef-ormedronthe inner surface thereof an arcuateeccentric or cam surface 193 With whichapressureroll 194 cooperates, therolls; being rotatably mounted on: vertical pin-sc i95-carried by acontrol wheel 196rrotat-- ably mounted onthehub of the driver memher 186and interposed between the feed drums; 10; and 11. Thus it will be seenthat when; the control wheel 196 is grasped by the operator-andmanuallyrotated the pressure; rolls l94-move along the eccentricsurfaces: 193 onthe brake shoes, forcing the latter outwardly, therebycausing the lower feed drum! 10 to be frictionally connected to the.upper feed-drum 11- for'rotation therewith. It will also be obvious'thatupon suit able. release of the control wheel the lower brake shoes,forcing the latter upper-feed drum 11 at o fthe latter.

feed drum 10 may be disconnected from the will during rotation When thedriver member 186 isirotated with the drum 10 under load the inclinedsurfaces 188. on the fingers 187 act against the. inclined surfaces189.- of the outwardly therebyapplying the brakeandi supplementing; theaction of the pressure rolls 194. It

will further be: obvious that the feed drums l0 and 11 may berotatedtogether or remain idle while the gear 121 continuously'rotatesby suitable application of the clutch 147 149 and 151. Moreover, whenthe clutch 147, 149, 151- is connected and upon'a'pplication of theclutches 1'32, 133 controlling connection of the'worm gears 109 and 110to the shaft 114, the feed drums 10, 11 may be rotated at a relativelyslow speed or at a relatively high sp,eed,'the drums rotating in thesamedirectionatboih speeds. As-shown in Fig. 1, in order to permit cuttingaccording to the room and pillar method a guide sheave or swing arm 200is provided having a mounting 201 pivotall-ycarried by a bracket 202whereby it'may be secured to the machine ra-m'e by alsuitable dowel 203(see Fig. 1) anda' cooperating bolt 204 adj acentthe cutter barend ofthe machine and this. guide sheave can beshifted from side'toside of themachine frame, depending upon the direction of cut desired. Referring toFigs. 4, 8 and 10 it will-beobse'rvedthat the outer end ofthe feed framesection 13is cut away as at 205to permit thegear 116 to mesh with atruckdriving gear of any suitable form,

Referring: more par- 'right angles to of the machine. The motor housedwith the frame section 12 is adapted to becontrolled by any suitablecontrolling mechanismincluding a controlling handle 208 convenient.- lylocated opposite the feed control: handle 145.

In the operation of the improved mining machine when operating inaccordance with the longwall system of mining thefeed cable 9 may beextended along the side of the machine'as indicated by dotted linesinFig. 1

and attached in a suitable manner to a twopart hook connected to therecess 49 in the locking ring 48. The operator then grasps the handle'72and releases, the locking mem ber 69 from the locking 34, and 44 beingconnected at that'time. The operator then manipulates the-handle 145applying the slow speed clutch 132, 133 and connecting the slowspeedworm gear 110 to the shaft 114'. The clutch 147, 149, 151 is thenconnected and consequently the feed drum 11 is rotated, winding'in thefeed cable'9 and swinging the cutter bar 6 about its pivot 5'. l/V'henthe cutter bar assumes a position: at

the machine frame as indicated by dotted lines in Fig. l the operatoragain manipulates the handle 7 2, rotating the locking member 69 *andmovingthe latter within .one'of the locking grooves -rigidly lockingthecutter bar to the machine frame. Thefeed cable 9and the hook are thendetached from the locking ring 48 and the cable is then extendedaroundone of' the'guide sheaves'206, to a point in advance of themachine frame, the free end of this cable being anchored in a suitablemanner. The hand wheel 145 is then appropriately manipulated by theoperator aud t-he clutch: 132,133 applied, thereby causing the feed drum11 to Wind in the cable and the machine is fed at locked to the latterand upon.reversal of. the

motor, reversal of the cutter bits intheirrespective links, and the feedcables being wound reverselyon.

groove 50, the clutch be swung angularlly rela their respectivedrumsly-d'escribed one form of which; my invention may assume-inpractice, itwill be understood that this form of the same is shown for purposes: ofillustration and that the endfof: said motor, and feeding mechanismdriven from theopposite end of said motor fon'feeding themachine bodilylaterally over the mine bottom including coaxially arranged relativelyrotatable feed operating members each. adapted to be driven by saidmotor and cooperating.flexiblefeeding means including advance and]receding flexible feeding portions extending in opposite directionsfrom'opposite ends of said frame and cooperating-with said"feedoperating members respectively. v I a 2.; Ina minin tmachine' ahorizontal motor n e b I 7 e I having: its ax s extending longitudinallyof the machin'e ,cuttin tmechanlsm driven from one endiof' saidmotor,an'dfeeding mechanism driven from the opposite-end of said motorincluding:coaxially'anranged'relatively rotatable: feed operatingmember-s disposed on a vertical axis and each adaptedto cooperate withflexible feeding means.

3. In a: mining machine, a horizontal 1110- 'tor having its axisextending, longitudinally of the machine, cuttingm-echanisin driven fromone end of said, motor including a horizontal .swingable cutter bar, andfeeding mechanismdriven from the opposite end of fsaidmotor'. includingcoaxially arranged relatively rotatable feed operating membersdisposed-on a vertical axis and each adapted. to cooperate with flexiblefeeding means.

4:. In a mining'machine, a machine frame presenting parallel planesurfaces upon which the machine is adapted to be selectively supportedduring cutting, a horizontal motor in c said: frame-having its axisextending longitudinally of the machine, cutting mechanism driven fromone end of said motor, and feeding me'chanism driven' fromthejoppositeend of said motorincluding coaxially arranged relativelyrotatable feedoperating members each adaptedto cooperate with flexiblefeed operativeto feed'the machine when supported on either surface ofsaid frame.

5'1" Ina mining machine, a machine frame 7 presenting parallel planesurfaces upon which the-machine: isiadapted to be selectively supportedduring'cutting, a horizontal motor in said: frame: having its axis?extending longitudinally oftlie machine, cuttings mechanism ing meansand disposed on a vertical axis and miners relatively rotatable feedoperating members each adapted to cooperate with flexible feed- ,ingmeans and disposed on a verticali axis and operative tofeed'the machinewhen supported oneither surface of said frame.

6. In a mining machine, a machine frame slidable on its bottom on themine bottom and carrying ahorizontal motor having its axis extendinglongitudinally of the machine, cutting mechanism driven from one end ofsaid motor, and? feeding mechanism driven from the opposite endof saidmotor for feeding the machine bodily laterally over the minebottomii'ncluding a pair of relatively rotatable feed operating members,one of said feed operating members being connectible to the other forrotation therewith and cooperating flexible feedingmeans includingadvance and receding; flexible feeding portions extending in oppositedirections from opposite ends of crating members.

8. Ina mining'machine, "a horizontal? mo.-

tor having, its axis extending longitudinally of the machine, cuttingmechanism driven from one endiofsaid motor, and feeding mechanism drivenfrom the opposite end of said motor including, coaxially arranged:relatively rotatable feed operating members; dis-posed on a verticalaxis and eachiadaptedito coop.- erate with flexible feedingmeans,,plural speed driving gearing for rotatingone of said feed"operating members at a plurality of speeds, and. means for. connectingthe other feed operating member tosaidpower driven feed operating memberfor rotation therewith; I

9. In a mining machine,.a motor,. and feeding mechanism driven by saidmotor including a pair of'relatively rotatable feed operaingmemberseachadapted to cooperate with flexible feeding means, pluralspeed dniving gearing for rotationg one of said members at k '20. In aimachine, a motor, an

feedingmeansi driven thereby including coax arranged relativelyrotatable freed operat r g-members each rotatable 'ona vertical axisiandadapted to cooperate with flexible;

feeding means, and driving connections between said motor and said feedoperating members comprising worms rotatable at ditferenlt, speeds ontransversely extending horizontal axes, and Worm gears constantlymeshin'gtherewith, and driven thereby at different speedsaiidselectivelyoperable as driving membersjfor said feed operating members.

' 21 In a mining machine, a motor, and feeding mean-s driven'tlierebyinclnding coa-xially arranged relatively rotatable feed operating 7members, each adapted to. cooperate with flexible feeding .rneans. d v

ween said motor and said feed operating ineniberscoinprising ormsrotatable at dit ferentspeeds on transversely extendinghorizontal'aXca-worm gears constantly meshing therewith andselectivelyoperable as driving members for said feed operating members,

speed controlling clutches arranged coaxjferent vpeeds on transverselyextending hori- ZQIllJZtl'fiXQS, worm gears constantly meshing.therewlithyand slectively operable as driving members for said feedoperating members, and speed controlling clutches arranged coaxiallywith said Worm gears.

23. In a mining .machine, a motor, feeding means driven therebyincluding coaxially varranged relatively rotatable feed operatingmembers each adapted to. icoeperate with flexiblefeedin'g means, anddriving connec ti'ons between said motor and said feed operatingnenibersicomprising Worms rotatable on transversely extending horizontalaxes,

Worm gears. constantly V meshing therewith, a

spur gear arranged ,comrially with said worm gears and connected "indriving relation with said feed. operating members, and meansioralternativel y connecting said worm gearsin dr ving relat1on with saidspin: gear.

'24:. In machine, a motor, feeding I means. driven thereby inclnd-ingcoaxiali iy are adapted tolcooperate with fiex'ible'feeding ineans anddriving'connectlons between said I motor and sa 'dvfeed operatingmemberscoinranged relatively rotatable feed operating members eachrotatable on a vertical axis,;-and

prising Worms rotatable on transversely extend ng. horizontal axes,wormgears constant- 1y meshing therewith, a spur gem arranget coa-xiallywith said worm .gears landsconiae vin connections nected in drivingrelation; with said ,lfeed-op eratingmcmbers, and means'for alternatvely connecting said worm gears n driving relation withsaid spur gear. Vi

25. In a miningtmachin a horizontal mo;

torh'aving its axis extending longitudinally of the machine andfeedinmeans driven thereby i n cliiding plurality of relatively .rotatablefeed operating members each adapted to cooperate with ilexibleieedingmeans, and

between said motor and said feed operating members. coni pri ingworms-rotatabletransversely extending horizontal axes, worm gearsmeshing there-with, a spur gear arrange-d coaxi-ally with. said wormgears, a spur gear connected in driving relation with ens of said teedeperating members and mesh ing with said first mentioned spur gear,means for alternatively connecting said Worm gears relation withsaidfirst men tioned spirit-gear, andmeans for connecting said teedoperating members together i301 tation. I i

1 i ing machine,amotor,and feeding means driven thereby including aplurality of ceaxially arranged relatively rotatable feedeperatingmembers each adapted to: co-

operate-with flexiblefeeding means, and driving connections betweensaid-motor and said teed operatingmembers comprising worms rotatable ontransversely-extending horizontal axes, worm gearsjmeshing therewith, a1'1" gear arranged coaxially-with said Worm gears,- a spnrggearconnected in driving relation with one of said teed ope-rating membersmeshing withsai; firstymentioned spur gear, means for alternativelyconnecting said is gearsi-n driving relation with said first .iblefeeding means, and driving connections mentioned spnr gear, and meansfor connect- 7 iii-g: said feed eperating'members-together forsimultaneous rotation. r I

28. In a nnning machine, a motor, and

teeding naeans driven thereby including a p ltn'ality of coaxiallyarranged relatively I701 ta sble feedoperating members each rotaton a"vertical axis and adapted to mumperate with flexible feedingH1@3,11S,a-I1Cl-d-I -LV- ing connections between said-motor and saidfeed operating members comprising worms rotatable on transverselyextending horizontal axes, worm gears meshing therewith, a spur geararranged coaxially with. said. Worm gears spur gear connected indriving'relation with one of said-feed operating members and meshingwith saidlirst mentioned" spur gear, means for: alternat vely connectingI said worm gears in driving relation with said first mentioned spurgear, and meansfor connecting said feed operating members together forsimultaneous rotation. i I i i 29. In a mining machine, ainotoijandfeeding means driven thereby including a plurality ofrelativelyrotatable feed operating members each adaptedjto cooperate with flexiblefeeding means, driving connections between said motor'andjfsaid feedOperating members comprising worms rotatable on transversely extendinghorizontal axes, worm :gears meshing therewith, i a spurigear arrangedcoaxially with saidfwo'rin gears, a

larger spur gear connected in driving relaa tion withone of saidfeed'operating members and meshing withrsaid spur gear, means foralternatively connecting said worm gears in driving relation with saidfirst mentioned spur gear, releasable means: for connecting said lastnamed spur gear in driving relation with said larger spurgear, andmeansfor con- I n-eoting said feed operating members together "forsimultaneous rotation. I

- 30. Ina mining; machine, a motor, and feeding means driven therebyincluding a plurality of coaxiallyarranged relatively rotatablefeedoperating members each adapted to cooperate with flexible feedingmeans, driving connections between said motorand said. feed operatingmembers comprising worms rotatable on transverselyextending horizontalaxes,,w orni gears meshing there-.

with, a spur geararranged coaxiallywith said worm gears, a largerspurgearflconnected in driving relation with one of said feed'opjeratinginember's and meshing with said spur gear, means for alternativelyconnecting said a worm gears in driving relation with said firstmentioned spur gear, a releasable means. for

connecting saidlast mentioned spur gearin driving relation with saidlarger spur'gear,

* and means for connectingsaid feed operating members: together forsimultaneous rotation. v- I r i 31. In a 'mining, machineya i motor, andfeeding means-driven thereby including a plurality of coaxially'arrangedrelatively rotatable feed operating members each rotatable on'a vertical.axis and adapted to coop.

erate -Wltl1ffleXlbl6I feeding means, driving connectionsbetween saidmotor and said feed operating members comprising worms rotatable on.transversely 'extending horizontal axes, worm gears meshing therewith,a spur gear arranged coaxially} with said worm gears, a larger spur.gearconnected 1n driving relation with one of said feed operating 7members and nieshii'igfwith I said spur gear,

means foralternativelyconnecting saidworm gears in drivingI'GlatIOIlWIth SaId first mentioiiedspur gear, a releasable means forcon-i ne'cting' said last named spur gear in driving relation withsaidlarger spur gear, and means for connecting said feed operating memberstogether for simultaneous rotation. i

32. In a mining machine, a motor having a motor pinion,'and feedingmeans driven I thereby including a plurality of relatively rotatablefeed operating members each adapted to cooperate with flexible feedingmeans, and

versely extending axis, a worm rotatable with said bevel gear, a wormgear meshing with said Worm, and driving connections between said wormgear and said feed operating memhere through which one or both of thelatter may be selectively driven. I

' 33. In a mining machine, a motor having a motor pinion, and feedingmeans driven thereby including a plurality of coaxially arrangedrelatively rotatable feed operating members each adapted to cooperatewith flexible feeding means, and driving connections between said motorand said feed operating members comprising a spur gear meshing with saidmotor pinion, a spur gear meshing with said gear, a bevel pinionrotatable with said last mentioned gear, a bevel gear meshing with saidbevelpinion and r0- tatable on a'horizontal transversely extending axis,a: worm rotatable with said bevel gear, a worni'gear meshing with saidworm, and driving connections between said worm gear and said feedoperating members.

:34. In a mining'machine, a motor having a motor pinion,and feedingmeans driven thereby including a plurality of coaxially ar- 7 rangedrelatively rotatable feed operating members each rotatable on a verticalaxis and adapted to cooperate with flexible feeding means, and drivingconnections between said motor and said feed operating inemberscomprising a spur gear meshing with said motor pinion,a spur gearmeshing with said gear, a bevel pinion rotatable with said lastmentioned gear, a bevel gear meshing \Vl'liltSftlCl bevel pinion androtatable on a horizontaltransversely extending axis, a worm' rotatablewith said bevel gear, a worm gear:

meshing withsaid worm, and driving connections between said worm gearandsaid feed operatingmembers.

thereby including a plurality of relatively rotatable feed operatingmembers each adapted to cooperate with flexible feeding means, anddriving connections between said motor and said feed operating memberscomprising a spur gear meshing with said 3 5. In a mining machine,amotorhaving i a motor pinion, andfe-eding means dIlVGII' annangedrelativelyrotatable teedoperatin i teenagers:

with said bevel pinion andw rotatable on a horizontal transverselyextending axis, a

worm-rotatable with said: bevel gear, a worm: gear meshing with saidworm, and driving connections between saidworm geanand said feedoperating members through. which one on both. otthe lattermaybeselectively driven including: a manually operable controlling clutcln. rI v 36;. In amining machine,.amotor having-a motor: pinion-,1 and:feeding means driven thereby including, a plurality of coaxially'members each: adapted to co oper ate with. ible: feeding means, and;driving connections between] said? motor and; said teed operatingmemberscompri'sing El? spur. gear meshing with. said; motonpinion, a:spur gear meshing with said gear, a bevelipini-on rotatablewith said;last" mentioned: gear, a. bevel gear meshing withsaid: bevel pinion; androtatable on a; horizontal; transversely extending axis, av wormrotatable with; said bevel gear, a worm: gean' meshingfwith sai-dtworm,and: driving connections between said worm; gear. and" said feed.operating members including a; manually. operable controlling clutch.

37. In; a mining machine, a; motor having a. motor: pinion, and, feedingmeans driven;

thereby-including a plurality of coaxiall'y: arranged; relatia elyrotatable teed; OPQIEHJ? lng'members each rotatable on a verticalzaxisancb adapted to cooperate' with flexible feedingmeans, and:drivingconnectionsbetween sai'd motor and said teedi'operating memberscomprising spur gear meshing with; said: motor pinion, a spur.- gearmeshing with said? gear; bevel pinion rotatable with said itib"mentioned: gear, abevtel gear meshing with. said bevel pinion and?rotatable; on. a: horizontal transversely extending axis; a

worm rotatable with said bevel: gear; a worm geargmeshing with saidworm, and driving connections-between.said worm gearand said.feedopenating members includln-g a1 mannfallv' operable:controllingclutclt 38. In a: mining 'machine, a; motor, and: feeding,means. driven thereby including plurality of relatively. rotatable-feedoperating members each rotatable ona: vertical axis and adapted; tocooperate with: flexible fee-din means, anddriving connections be tween;said. motor a-ndfsai'cl feed operating members compri sing worm g s; and means toralternatively connecting *worm gears in dni'ving" relationwith said feed: operating members to cause either ofthe latter to-drawin a; portion of said; fiexible ifeeding means during" thefeedingoperation.

392.111 a mining machine, a motor, and feedingrmeans driven. therebyincluding a plurality of: relatively rotatable feed operatin'gmembers:each rotatable on a vertical memberscomprising wornr gears, means foralternatively connectingsaid worm: gears in driving relation with saidfeed operatingmembers, andimeanstw permitting relative rotation. betweensaid feedoperating; mem bers or-connecting said members-together forsimultaneousrotation: to cause the latter to simultaneously draw.iii-portions of said flexible feeding means during the feedingoperation: I

40:. Inna. mining: machine, a motor, and feeding means driven therebyincludinga: l unalitiy of relatively rotatable feed open- .g memberseach rotatable on: a vertical 311181 and adapted; to; cooperate with.flexible feeding means, driving connections between; saidimotonzandsaidz teed; operatingmembers, and. manually operable frictional. meansfor permitting relative rotation between said teed. operating members oryi'eld'ably connecting saidmemberstogether for simultaneous rotation.

41. In a mining machine;.azmotonand; feeding' means driven therebyincluding a plurality otj coaxiailyr arranged: relatively notat ablefeed; operating members each! rotatable. on vertical axis: and adaptedto cooperate with; flexible. feeding. means, driving connec-.- tionsbetween said? motor and. said feeds oper-- members,, and manually-.operable fi ic tional'meanstor permitting relative rotation between;said teed operating member's orfor yi'eldablyconnecting said memberstogether for; simultaneous:rotation; i

- @3111 a: mining machine,v a. motor, and feeding means driven therebyincluding a pluralityof relativelyrotatable.-. feed: operating memberseach havingdos' axis-vertical; and adapted to cooperate with flexiblefeeding means, and driving connections between sai dmotor and: said.teed: operating members con'n prising coaX-ially. arranged worm; gears,;and means foralternatively:connecting said; Worm gears in drivingrelation with said feed operatingmembers.

43; In mining machine,.a.-motor, and feed ing means driven: therebyincluding" a; plug razlit i of coaxially' arranged relatively rotat ableteed; operating members eaclr. having its vertical and. adapted? tocooperate with flexible feeding means, and driving connec .members eachhavingits: axis vertical. and

adapted to cooperate with flexible feeding means, and drivingconnectionsbetween said ,mot'orandsaid feed operating members comprising coaxiallyarranged worm gears, means for alternatively connecting said worm "gearsind'riving relation with said feed operatingniembersg'and meanspermittingrelj ativev rotation between said feed operating members orfor connecting said members to- '-gether for simultaneousrotation;"f

145. In a mining machine, a'motor,;feeding means driventhereby'including a plurality of coaxiall'y "arranged relativelyrotatable.

feed operating members each adapted to co-" operate with fiexiblefeedingmeans,and driving. connections between said motor and said feed'operating members each adapted to cooperate with flexible feedingmean'sincluding fa: horizontal shaft extending transversely of; themachine, acsecond shaft arranged parallel with and above said-shaft,gearing connecting said shafts, fast'and slow speed worms car,-

ried by said shafts respectively, worm gears meshingjjwith' said *worms,and means for alternatively connecting said worm gears "in drlvngrelatlon 'w thsald feed operating 46. Ina mining machine, amotor,"feeding meansldriven thereby including a plurality I offcoaxially 'arranged'frelatively rotatable feed operatingmembers eachhaving its axis vertical and adapted to cooperate with-flexible feedingmeans,- and "driving connections between said motor andfeed "operatingmembers including a, horizontal shaft "extending transversely ofthe-machine, a second shaft I arranged paralleliwith and above saidshaft,

operating members; j

7 latter in driving're'lation with saidfe'ed oper-f n ating members.

g aring connecting said shafts, fast and slow speed worms carried bysaid" shafts respectively, worm gears meshing with said worms,

and, means for alternatively connectin g said worm gears indrivin'g'relation' with saidfeed 47. In a mining machine, a motor,'andfeed;

ingmeans driven thereby including a plurali'ty ofc'oaxially' arrangedrelativelyrotat= able: feed opera-tin members each afdapted tocooperate, with flexible 1 feeding means; and driving connectionsbetweensaid motor and said feed operating members comprising a horizontal shaftextending transversely of the machine, a second shaft arranged parallelwith and'above said shaft, gearing connecting said shafts, fast and slowspeed worms carried by said shafts respectively, worm gears meshing withsaid worms, and means including friction clutches arrangedcoaxially withsaid worm gears for alternatively connecting the tions between saidmotor andfeed operating members comprising a horizontal shaftoeX- tendng transversely ofthe machine, a second shaft arranged parallel with andabove said shaft,"gearing connecting said shafts, fast and slow speedWorms carried by said-shafts re- 'spectively, worm gears meshing withsaid worms, andmeans including frictional clutches arrangedcoaxiallywith said worm gearsfor alternatively connecting the latter indriving relation with said feed operating 7 members.

y 49. In a mining machine, a motor, and feeding means driventhereby-including coa'xially arranged relatively rotatable feedoperating members each adapted to cooperate with flexible feedin means,andpluralspeed driving means therefor including coaxially ar-i rangedWorm gears selectively operable to drive saiolmembe'rs at differentspeedsfin' the same direction. i

50. Ina mining machine, a motor, and feeding means driven therebyincluding coaxially arrangedrelatively rotatable feed operating memberseach adaptedto cooperate with flexible feedingmeans, fast and slow speedI transmission means between said motor and feed operatmg membersincluding coaxlally arranged'Wo-rm' gears, and means for only aalternatively connecting said worm gears in dr v ng relation wlth' saidfeed operating member'sf I ;51. In a'mining machine, a-motor, and feed-I ing means driven thereby including coaxially arranged relativelyrotatable v feeding operating'members each having its'axis vertical andadapted to cooperate with flexible feeding means, fastvand'slow speedtransmission means between said motor and feed operat ingi membersincluding coaxially arranged worm gears, and means for onlyalternatively.connectingsaid worm gears in driving rela' tion with said feedoperating members. 52- In a mining machine, a motor, and feed ing meansdriventhereby including a plucooperate with flexible feeding means, 1and fast and slow speed transmission means between said motor and feedoperating members including coaxially arranged Wormgears rotatable on avertical axis and selectively ops erable to drive said feed operatingmembers at different speeds in the same direction.

' 53. In a miningmachine, a motor, and feeding means driven therebyincluding a plu rality of. coaxially arranged relatively. ro-

its axis verticalandadapted to cooperate with flexible ffeedingmeans,and fast and sloW I, i rality'of'coaxially arranged'relatively rotata-'ble feed operating members each adapted to ablefeed operating memberseach having speed transmission means bet-weensaidmotor I axiallyarranged wormgears selectively opand feed operating members includingcoerable to drive said members at different speedsin the same direction,said worm gears being; disposed on axes p rality of coaxiallyarrangedrelatively rotatable feed operatlnginembers each adapted;

to'cooperate with flexible feeding means, and

fast: and slow speed transmission means be tween said motor and S3161feed operating members including coaxially arranged wern'igearsrotatable about a vertical ax s, and

means for only alternatively connectingsaid worm gears in drivingrelation'w th said feed operating members; 7

55. In a miningmachine, a motor, and feed-' v ingmeans driven therebyincluding a plurallty of coax ally arranged relatively ro- 'tatable feedoperating members each having its axis verticaland adapted to cooperatewithflexible feeding means, and fast and slow speed transmissionmeansbetween said motor a and :feed operating members including co axially.arranged worm gears disposedv on an" ax1s parallel with the axes of saidfeed opcrating members, and means for only alternate livelyconnectingsaid worm gears in driving,

"relation with said feed operatingmembers.

56. In a mining machine, a motor, and feeding means driven therebyincluding; plurality ofrelatively rotatable feed operating members eachadapted to cooperate with flexible feeding means, and fast andslowspeedtransmissionmeans between said motor and said'members includingparallel orms rotatable on horizontal axes extending transversely of.the machine, r

5 7. In a mining machine, a motor and feeding means driven therebyincluding a plurality of relatively rotatable feed operat inglmemberseach adapted to cooperatewith flexible feeding means, and fast and slow.speed transmission means between said motor and said members includingparallelworms 1 rotai able on horizontal axes extendingitrans- 7verse'l'y of the machine, and coaxially; ar-

ranged worm respectively. I v is 7 58. In a mining machine, a motor,and. feeding meansdriven thereby including 1a plurality of coaxiallyarranged relatively rotatable'feed operating members'each having itsaxis vertical and adapted to cooperate with flexible feedingmeans,fast'andslow speed transmission means between said motor and said feedoperating members including parallel wormsrotatable on horizontal axesextending transversely of the machine.

59. In a mining machine; a motor, and feeding means driven therebyincluding a plurality of coaxially arranged I relatively rotatable feedoperating members each hav-, ing itsaxis verticaland adapted tocooperate with flexible. feeding means, fast and slow speed transmissionmeans, between said motor gears meshing with said worms andsaid feedoperating members including.

parallel worms rotatable, on 1 horizontal axes! extending, transverselyof: the 3 machine,- and coaxially arranged worm feeding means driventhereby includinga,

plurality of coaxially. arranged relatively rotatable feedoperatingrmembers eachhaV- ing its axis verticalandadapted to coopera ewith flexible feeding means, and fast and slow speedtransmission meansbetween-said motor and said feed operating members, lI1-- cludingparallel worms; rotatablev on hori? zontal axes extending transverselyof themachine, coaxially arranged worm gears; meshing with said wormsrespectively, andmeans for alternativelyconnecting said: worm gears indriving relation, with said feed; operating members.

'61 Ina mining. machine, a. machine r frame slidable on its bottomv on;the mine bottom; and carrying a; horizontal moton having; its;

gears meshing with; r

iii

axis extending longitudinally, of theema.

chine,cutting mechanismv driven fromone, end of said motor. including apivoted-cutter bar adjustable into positions at each'side of, saidframeand lengthwise of said frame, and feeding means driven, fromtheoppositeend of said: motor includingcoaielally arr ranged relativelyrotatable feed operating members each adapted to be driven by saidmotor, and cooperating flexible feedingmeans for feeding the" machinebodily over; the;

mine bottom in any position of said cutter. bar and including, advanceand receding flex: ible feeding portions cooperating with; said feedoperating membersrespectively.

62.1n a miningmachine, a horizontal; motor having its axis, extendinglongiludinally of the machine, cutting mechanism driven: from oneendrofsaid motor including a pivoted cutter bar adjustableintoTpositiQns at each side ofthe. machine and lengthwise of themachine, and feeding means driven from the 'oppositeen'dof. saidamotorfor feed:

,ing t-h-egmachine in, any position of said bar. including coaxiallyarranged relatively rotatable feedoperating'mem'bers disposed :on avertical axis and each adapted to cooperate with flexible,feedingmeans." I

63. In a mining machine, a. machine frame slidable on. its bottom onthe, mine bottom and carrying a horizontal motor having its axisextending longitudinally of, the machine, cutting mechanism driven fromone end of said motor including aghorizontal- 'swinga-ble cutter bar,and feeding mechanism driven from the opposite end of said vvmotor forfeeding the machine bodily laterally over the mine bottom includingcoaxially arranged relatively rotatable feed operating members disposedon-a vertical axis and; each adapted to cooperate with flexible feeding.means.

64:. In a. mining machine, a machineframe presenting parallel planesurfaces uponwhich ill)

